与CTLA-4阻塞结合的ICOS辅助刺激将瘤相关的巨细胞重塑为抗瘤表型
Naveen Sharma1, Xiaozhou Fan1, Oluwatomisin T Atolagbe1
1Department of Immunology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
The Journal of experimental medicine
|March 22, 2024
概括
使用ICOS辅助刺激 (IVAX) 和CTLA-4阻断的组合癌症疗法重塑了免疫微环境. 这种方法增强了抗瘤T细胞和M1-类巨细胞,这对于瘤排斥至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
- 细胞疗法 细胞疗法
背景情况:
- 之前的研究表明ICOS辅助刺激 (IVAX) 和CTLA-4阻断在抗瘤治疗中的协同作用.
- 了解这种组合疗法的免疫细胞动态对于优化癌症治疗至关重要.
研究的目的:
- 为了研究由组合疗法诱导的淋巴状和骨髓状部分的免疫变化.
- 阐明特定免疫细胞,特别是巨细胞在联合免疫疗法的疗效中的作用.
主要方法:
- 利用CyTOF (飞行时间细胞计) 和单细胞RNA测序来分析免疫细胞群.
- 雇佣巨细胞耗尽使用clodronate评估他们的功能重要性.
- 研究了干扰素- (IFN-γ) 在巨分化中的作用.
主要成果:
- 与抗CTLA-4单一疗法相比,组合疗法显著重塑了淋巴细胞和骨髓细胞区.
- 观察到 Th1 CD4 T 细胞,效应体 CD8 T 细胞和 M1 类亲炎性巨细胞的丰富种群.
- 类似M1的巨细胞对抗CTLA-4与IVAX或抗PD-1结合的治疗疗效至关重要.
- 巨细胞枯竭导致T细胞透和抗瘤功能受损.
- IFN-γ对于M1-样巨细胞的招募和两极分化至关重要.
结论:
- 在瘤内效应性T细胞和瘤相关巨细胞 (TAMs) 之间存在积极的反循环.
- 来自T细胞的IFN-γ将TAM两极分化为类似M1的表型,这反过来又促进了T细胞的透和功能.
- 这种相互作用对于通过组合免疫疗法促进瘤排斥至关重要.
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